<template>
	<div>
		<!-- 面包屑导航区域 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>权限管理</el-breadcrumb-item>
			<el-breadcrumb-item>角色列表</el-breadcrumb-item>
		</el-breadcrumb>
		<!-- 卡片视图区域 -->
		<el-card>
			<!-- 添加角色按钮区域 -->
			<el-row>
				<el-col>
					<el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
				</el-col>
			</el-row>
			<!-- 角色列表区域 -->
			<el-table :data="rolelist" border stripe>
				<!-- 展开列 -->
				<el-table-column type="expand">
					<template slot-scope="scope">
						<el-row :class="['bdbottom',i1 === 0? 'bdtop' : '', 'vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
							<!-- 渲染一级权限 -->
							<el-col :span="5">
								<el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
								<i class="el-icon-caret-right"></i>
							</el-col>
							<!-- 渲染二、三级权限 -->
							<el-col :span="19">
								<!-- 渲染二级权限 -->
								<el-row :class="[i2 === 0? '' : 'bdtop', 'vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
									<el-col :span="6">
										<el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName}}</el-tag>
										<i class="el-icon-caret-right"></i>
									</el-col>
									<!-- 渲染三级权限 -->
									<el-col :span="18">
										<el-tag v-for="item3 in item2.children" :key="item3.id" type="warning" closable @close="removeRightById(scope.row, item3.id)">{{ item3.authName}}</el-tag>
									</el-col>
								</el-row>
							</el-col>
						</el-row>
					</template>
				</el-table-column>
				<!-- 索引列 -->
				<el-table-column type="index"></el-table-column>
				<el-table-column label="角色名称" prop="roleName"></el-table-column>
				<el-table-column label="角色描述" prop="roleDesc"></el-table-column>
				<el-table-column label="操作" width="300px">
					<template slot-scope="scope">
						<!-- 修改 -->
						<el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
						<!-- 删除 -->
						<el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)">删除</el-button>
						<el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
					</template>
				</el-table-column>
			</el-table>
		</el-card>
		<!-- 添加角色的对话框 -->
		<el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
			<!-- 内容主体区域 -->
			<el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
				<el-form-item label="角色名称" prop="roleName">
					<el-input v-model="addForm.roleName"></el-input>
				</el-form-item>
				<el-form-item label="角色描述" prop="roleDesc">
					<el-input v-model="addForm.roleDesc"></el-input>
				</el-form-item>
			</el-form>
			<!-- 底部区域 -->
			<span slot="footer" class="dialog-footer">
				<el-button @click="addDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="addRole">确 定</el-button>
			</span>
		</el-dialog>
		<!-- 编辑角色的对话框 -->
		<el-dialog title="添加角色" :visible.sync="editDialogVisble" width="50%" @close="editDialogClosed">
			<!-- 内容主体区域 -->
			<el-form :model="editForm" :rules="addFormRules" ref="editFormRef" label-width="80px">
				<el-form-item label="角色名称" prop="roleName">
					<el-input v-model="editForm.roleName"></el-input>
				</el-form-item>
				<el-form-item label="角色描述" prop="roleDesc">
					<el-input v-model="editForm.roleDesc"></el-input>
				</el-form-item>
			</el-form>
			<!-- 底部区域 -->
			<span slot="footer" class="dialog-footer">
				<el-button @click="editDialogVisble = false">取 消</el-button>
				<el-button type="primary" @click="editRoleInfo">确 定</el-button>
			</span>
		</el-dialog>
		<!-- 分配权限的对话框 -->
		<el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%"
		@close="setRightDialogClosed">
			<!-- 内容主体区域 -->
			<el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" 
			default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
			<!-- 底部区域 -->
			<span slot="footer" class="dialog-footer">
				<el-button @click="setRightDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="allRights">确 定</el-button>
			</span>
		</el-dialog>
	</div>
</template>

<script>
	export default {
		data() {
			return {
				// 角色列表数据
				rolelist: [],
				addDialogVisible: false,
				addForm: {},
				addFormRules: {
					roleName: [{
						required: true,
						message: '请输入角色名称',
						trigger: 'blur'
					}],
					roleDesc: [{
						required: false
					}]
				},
				editForm: {},
				editDialogVisble: false,
				// 控制分配权限的显示与隐藏
				setRightDialogVisible: false,
				// 权限数据
				rightslist: [],
				// 树形控件的属性绑定对象
				treeProps: {
					label: 'authName',
					children: 'children'
				},
				// 默认选中节点的ID值数组
				defKeys: [],
				// 当前即将分配权限的角色ID
				roleId:''
			}
		},
		created() {
			this.getRolesList()
		},
		methods: {
			async getRolesList() {
				const {
					data: res
				} = await this.$http.get('roles')
				if (res.meta.status !== 200) return this.$message.error('获取角色列表失败')
				this.rolelist = res.data
				// console.log(this.rolelist)
			},
			addDialogClosed() {
				this.$refs.addFormRef.resetFields()
			},
			addRole() {
				// 校验表单信息
				this.$refs.addFormRef.validate(async valid => {
					if (!valid) return
					// 发出添加角色的网络请求
					const {
						data: res
					} = await this.$http.post('roles', this.addForm)
					if (res.meta.status !== 201) {
						return this.$message.error('添加角色失败')
					}
					// console.log(res)
					this.$message.success('添加角色成功')
					// 隐藏添加角色的对话框
					this.addDialigVisible = false
					// 重新获取角色列表
					this.getRolesList()
				})
			},
			async showEditDialog(id) {
				const {
					data: res
				} = await this.$http.get('roles/' + id)
				if (res.meta.status !== 200) {
					return this.$message.error('查询角色信息失败')
				}
				this.editForm = res.data
				// console.log(this.editForm)
				this.editDialogVisble = true
			},
			// 监听修改角色对话框的关闭事件
			editDialogClosed() {
				this.$refs.editFormRef.resetFields()
			},
			editRoleInfo() {
				this.$refs.editFormRef.validate(async valid => {
					if (!valid) return
					// 发起修改角色信息的数据请求
					const {
						data: res
					} = await this.$http.put('roles/' +
						this.editForm.roleId, {
							roleName: this.editForm.roleName,
							roleDesc: this.editForm.roleDesc
						})
					// console.log(res)
					if (res.meta.status !== 200) {
						return this.$message.error('更新角色信息失败')
					}
					// 关闭对话框
					this.editDialogVisble = false
					// 更新数据
					this.getRolesList()
					// 弹出更新成功信息
					this.$message.success('更新用户信息成功')
				})
			},
			async removeRoleById(id) {
				const result = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
					confirmButtonText: '确定',
					ancelButtonText: '取消',
					type: 'warning'
				}).catch(err => err)
				// 如果用户确认，返回"confirm"，如果用户取消，返回"cancel"
				// console.log(res)
				if (result !== 'confirm') {
					return this.$message.info('已取消删除')
				}
				const {
					data: res
				} = await this.$http.delete('roles/' + id)
				if (res.meta.status !== 200) {
					return this.$message.error('删除角色信息失败')
				}
				this.$message.success('删除角色信息成功')
				this.getRolesList()
			},
			async removeRightById(role, rightId) {
				// 弹框提示用户是否删除
				const result = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
					confirmButtonText: '确定',
					ancelButtonText: '取消',
					type: 'warning'
				}).catch(err => err)
				if (result !== 'confirm') {
					return this.$message.info('已取消删除')
				}
				const {
					data: res
				} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
				if (res.meta.status !== 200) {
					return this.$message.error('删除角色权限失败')
				}
				// this.getRolesList()
				role.children = res.data
			},
			// 分配权限的对话框
			async showSetRightDialog(role) {
				this.roleId = role.id
				// 获取所有权限的数据
				const {
					data: res
				} = await this.$http.get('rights/tree')
				if (res.meta.status !== 200) {
					return this.$message.error('获取权限数据失败')
				}
				// 获取到的权限数据保存到 data 
				this.rightslist = res.data
				// console.log(this.rightslist)
				// 递归获取三级节点的Id
				this.getLeafKeys(role, this.defKeys)
				this.setRightDialogVisible = true
			},
			getLeafKeys(node, arr) {
				// 如果当前 node 节点不包含 children 属性，则是三级节点
				if (!node.children) {
					return arr.push(node.id)
				}
				node.children.forEach(item => this.getLeafKeys(item, arr))
			},
			// 监听分配权限对话框的关闭事件
			setRightDialogClosed(){
				this.defKeys = []
			},
			// 点击为角色分配权限
			async allRights(){
				const keys = [
					...this.$refs.treeRef.getCheckedKeys(),
					...this.$refs.treeRef.getHalfCheckedKeys()
				]
				// console.log(keys)
				const idStr = keys.join(',')
				const { data:res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids:idStr })
				if (res.meta.status !== 200) {
					return this.$message.error('更新角色权限失败')
				}
				this.$message.success('更新角色权限成功')
				this.getRolesList()
				this.setRightDialogVisible = false
			}
		}
	}
</script>

<style Lang="less" scoped>
	.el-tag {
		margin: 7px;
	}

	.bdtop {
		border-top: 1px solid #eee;
	}

	.bdbottom {
		border-bottom: 1px solid #eee;
	}

	.vcenter {
		display: flex;
		align-items: center;
	}
</style>
